Technical specifications, features, applications and purchasing information.
| Brand | Allen-Bradley |
| Model | 2085-ECR |
| Product Category | Bus Terminator / Expansion I/O End Cap |
| Manufacturer | Rockwell Automation |
| Product Family | Micro800 |
| Product Series | Bulletin 2085 Expansion I/O |
| Primary Function | Terminates the End of the Micro800 Expansion I/O Communication Bus |
| Required Installation Position | Last Expansion I/O Module, Right End of Assembly |
| Compatible Controller Family | Micro850 |
| Additional Compatible Controller Family | Micro870 |
| Compatible Expansion System | Bulletin 2085 Micro800 Expansion I/O |
| Installation Locking Method | Press Both Front and Rear Latches Down to Lock |
| Terminal Function | Expansion Bus Termination; No Field I/O Channels |
| Digital Input Channels | None |
| Digital Output Channels | None |
| Analog Input or Output Channels | None |
| Field Wiring Terminals | Not Required for Bus Termination |
| Programming Requirement | No User-Programmable I/O Function |
| Dimensions, H × W × D | 96.4 × 15.6 × 59.1 mm |
| Dimensions in Inches | 3.8 × 0.62 × 2.33 in. |
| Approximate Shipping Weight | 50 g (1.76 oz) |
| North American Temperature Code | T6 |
| Equipment Classification | Open-Type Equipment |
| Intended Location | Indoor Industrial Control Enclosure |
| Installation Environment | Pollution Degree 2 |
| Overvoltage Category | Category II |
| Maximum Installation Altitude Without Derating | 2000 m (6562 ft) |
| Enclosure Access Requirement | Tool-Accessible Industrial Enclosure |
| Hazardous Location Rating | Class I, Division 2, Groups A, B, C and D When Appropriately Marked |
| UL Industrial Control Certification | UL File E322657, When Marked |
| UL Hazardous Location Certification | UL File E334470, When Marked |
| EU EMC Reference Standards | EN 61326-1, EN 61000-6-2, EN 61000-6-4 and EN 61131-2 |
| RoHS Reference Standard | EN IEC 63000 |
| Other Documented Certifications | RCM, KC and UKCA, When Product Markings Apply |
| Product Series | Series A, Manufacturer Product Catalog |
| UPC | 885630082417 |
| Product Lifecycle Status | Active |
| Related Conformal-Coated Model | 2085-ECRK |
| Conformal-Coated Variant Specification | Same Published Technical Specifications as 2085-ECR |
| Related Expansion I/O Modules | 2085-IQ16, 2085-OB16 and 2085-OF4 |
The Allen-Bradley 2085-ECR is an end-cap terminator designed to complete the serial communication bus of a compatible Micro800 expansion I/O system. Rockwell Automation requires it whenever expansion I/O modules are connected to a supported controller.
The module is used with Bulletin 2085 expansion I/O assemblies connected to compatible Micro850 and Micro870 controllers. It provides the required end-of-bus termination for installations with supported digital, analog and other expansion I/O modules.
The terminator attaches directly to the final expansion I/O module at the right end of the assembly. Its front and rear latches lock the end cap in place, providing a mechanically secured bus connection when installed according to Rockwell Automation instructions.
With dimensions of 96.4 × 15.6 × 59.1 mm and an approximate shipping weight of 50 g, the 2085-ECR occupies limited cabinet space while completing the Micro800 expansion system.
The 2085-ECR is a dedicated bus termination accessory rather than a discrete or analog I/O module. It does not add field inputs, outputs or programmable control functions, making its purpose distinct from the active Bulletin 2085 expansion modules.
The end cap is documented for open-type industrial equipment installations. Rockwell Automation specifies Pollution Degree 2, Overvoltage Category II and installation up to 2000 m without derating, with applicable product-marked safety and EMC certifications.
We support online purchase of the Allen-Bradley 2085-ECR Bus Terminator. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
What is the Allen-Bradley 2085-ECR?
It is a Rockwell Automation Micro800 expansion I/O bus terminator and end cap used to terminate the serial communication bus at the end of a compatible Bulletin 2085 expansion module assembly.
What is the main purpose of the 2085-ECR?
Its purpose is to provide end-of-bus termination for the Micro800 expansion I/O communication system. It must be attached to the last expansion I/O module when supported expansion I/O is installed.
Which PLC controllers are compatible with the 2085-ECR?
The module is designed for supported Micro850 and Micro870 controller expansion I/O systems. Check the controller's expansion capability before assembling the system.
Is the 2085-ECR required when using expansion I/O modules?
Yes. Rockwell Automation specifies that the bus terminator is required whenever an expansion I/O module is connected to the controller.
Where should the 2085-ECR be installed?
It should be installed at the right end of the expansion I/O assembly, directly after the final Bulletin 2085 expansion module.
How is the bus terminator installed?
With the system safely powered down, align the terminator with the connection on the last expansion I/O module and press down the front and rear latches to secure it, following publication 2085-IN002.
Can the 2085-ECR be removed while the PLC is powered?
No. Rockwell Automation warns that removing interconnected modules while power is applied can create an electrical arc and presents particular hazards in classified locations. Isolate power before removing or installing the terminator.
Does the 2085-ECR provide any digital or analog I/O channels?
No. It is a termination accessory and does not provide user I/O channels, sensor inputs or actuator outputs.
Does the 2085-ECR require PLC programming?
No separate user I/O program is required for the terminator itself. The connected expansion modules and controller must still be configured correctly for the application.
What happens if the expansion bus terminator is missing?
A missing required terminator leaves the expansion I/O bus assembly incomplete and can prevent proper expansion communication. Confirm the end cap is installed and secured when investigating expansion I/O communication faults.
What are the dimensions of the 2085-ECR?
The manufacturer specifies dimensions of 96.4 mm high, 15.6 mm wide and 59.1 mm deep, equivalent to approximately 3.8 × 0.62 × 2.33 inches.
How much does the 2085-ECR weigh?
Rockwell Automation lists an approximate shipping weight of 50 g or 1.76 oz.
What is the difference between 2085-ECR and 2085-ECRK?
The 2085-ECRK is the conformal-coated variant. Rockwell Automation states that the published technical specifications of the coated and non-coated versions are the same.
Can the 2085-ECR be used with a Micro850 analog output module?
Yes. It terminates a compatible expansion I/O bus that may include modules such as the 2085-OF4, together with other supported Bulletin 2085 modules.
Is the 2085-ECR suitable for hazardous locations?
The manufacturer documents Class I, Division 2, Groups A, B, C and D suitability for appropriately marked products. Installation must comply with the relevant approval conditions and hazardous-location electrical safety requirements.
Is the Allen-Bradley 2085-ECR discontinued?
No. Rockwell Automation currently lists the 2085-ECR with an Active lifecycle designation.
What should be checked before ordering?
Confirm catalog number 2085-ECR, Micro850 or Micro870 controller compatibility, Bulletin 2085 expansion I/O system, right-end mounting position, 96.4 × 15.6 × 59.1 mm dimensions, suitable control enclosure and whether the standard 2085-ECR or conformal-coated 2085-ECRK version is required.
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| Brand | Allen-Bradley |
| Model | 2085-ECR |
| Product Category | Bus Terminator / Expansion I/O End Cap |
| Manufacturer | Rockwell Automation |
| Product Family | Micro800 |
| Product Series | Bulletin 2085 Expansion I/O |
| Primary Function | Terminates the End of the Micro800 Expansion I/O Communication Bus |
| Required Installation Position | Last Expansion I/O Module, Right End of Assembly |
| Compatible Controller Family | Micro850 |
| Additional Compatible Controller Family | Micro870 |
| Compatible Expansion System | Bulletin 2085 Micro800 Expansion I/O |
| Installation Locking Method | Press Both Front and Rear Latches Down to Lock |
| Terminal Function | Expansion Bus Termination; No Field I/O Channels |
| Digital Input Channels | None |
| Digital Output Channels | None |
| Analog Input or Output Channels | None |
| Field Wiring Terminals | Not Required for Bus Termination |
| Programming Requirement | No User-Programmable I/O Function |
| Dimensions, H × W × D | 96.4 × 15.6 × 59.1 mm |
| Dimensions in Inches | 3.8 × 0.62 × 2.33 in. |
| Approximate Shipping Weight | 50 g (1.76 oz) |
| North American Temperature Code | T6 |
| Equipment Classification | Open-Type Equipment |
| Intended Location | Indoor Industrial Control Enclosure |
| Installation Environment | Pollution Degree 2 |
| Overvoltage Category | Category II |
| Maximum Installation Altitude Without Derating | 2000 m (6562 ft) |
| Enclosure Access Requirement | Tool-Accessible Industrial Enclosure |
| Hazardous Location Rating | Class I, Division 2, Groups A, B, C and D When Appropriately Marked |
| UL Industrial Control Certification | UL File E322657, When Marked |
| UL Hazardous Location Certification | UL File E334470, When Marked |
| EU EMC Reference Standards | EN 61326-1, EN 61000-6-2, EN 61000-6-4 and EN 61131-2 |
| RoHS Reference Standard | EN IEC 63000 |
| Other Documented Certifications | RCM, KC and UKCA, When Product Markings Apply |
| Product Series | Series A, Manufacturer Product Catalog |
| UPC | 885630082417 |
| Product Lifecycle Status | Active |
| Related Conformal-Coated Model | 2085-ECRK |
| Conformal-Coated Variant Specification | Same Published Technical Specifications as 2085-ECR |
| Related Expansion I/O Modules | 2085-IQ16, 2085-OB16 and 2085-OF4 |
The Allen-Bradley 2085-ECR is an end-cap terminator designed to complete the serial communication bus of a compatible Micro800 expansion I/O system. Rockwell Automation requires it whenever expansion I/O modules are connected to a supported controller.
The module is used with Bulletin 2085 expansion I/O assemblies connected to compatible Micro850 and Micro870 controllers. It provides the required end-of-bus termination for installations with supported digital, analog and other expansion I/O modules.
The terminator attaches directly to the final expansion I/O module at the right end of the assembly. Its front and rear latches lock the end cap in place, providing a mechanically secured bus connection when installed according to Rockwell Automation instructions.
With dimensions of 96.4 × 15.6 × 59.1 mm and an approximate shipping weight of 50 g, the 2085-ECR occupies limited cabinet space while completing the Micro800 expansion system.
The 2085-ECR is a dedicated bus termination accessory rather than a discrete or analog I/O module. It does not add field inputs, outputs or programmable control functions, making its purpose distinct from the active Bulletin 2085 expansion modules.
The end cap is documented for open-type industrial equipment installations. Rockwell Automation specifies Pollution Degree 2, Overvoltage Category II and installation up to 2000 m without derating, with applicable product-marked safety and EMC certifications.
We support online purchase of the Allen-Bradley 2085-ECR Bus Terminator. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
What is the Allen-Bradley 2085-ECR?
It is a Rockwell Automation Micro800 expansion I/O bus terminator and end cap used to terminate the serial communication bus at the end of a compatible Bulletin 2085 expansion module assembly.
What is the main purpose of the 2085-ECR?
Its purpose is to provide end-of-bus termination for the Micro800 expansion I/O communication system. It must be attached to the last expansion I/O module when supported expansion I/O is installed.
Which PLC controllers are compatible with the 2085-ECR?
The module is designed for supported Micro850 and Micro870 controller expansion I/O systems. Check the controller's expansion capability before assembling the system.
Is the 2085-ECR required when using expansion I/O modules?
Yes. Rockwell Automation specifies that the bus terminator is required whenever an expansion I/O module is connected to the controller.
Where should the 2085-ECR be installed?
It should be installed at the right end of the expansion I/O assembly, directly after the final Bulletin 2085 expansion module.
How is the bus terminator installed?
With the system safely powered down, align the terminator with the connection on the last expansion I/O module and press down the front and rear latches to secure it, following publication 2085-IN002.
Can the 2085-ECR be removed while the PLC is powered?
No. Rockwell Automation warns that removing interconnected modules while power is applied can create an electrical arc and presents particular hazards in classified locations. Isolate power before removing or installing the terminator.
Does the 2085-ECR provide any digital or analog I/O channels?
No. It is a termination accessory and does not provide user I/O channels, sensor inputs or actuator outputs.
Does the 2085-ECR require PLC programming?
No separate user I/O program is required for the terminator itself. The connected expansion modules and controller must still be configured correctly for the application.
What happens if the expansion bus terminator is missing?
A missing required terminator leaves the expansion I/O bus assembly incomplete and can prevent proper expansion communication. Confirm the end cap is installed and secured when investigating expansion I/O communication faults.
What are the dimensions of the 2085-ECR?
The manufacturer specifies dimensions of 96.4 mm high, 15.6 mm wide and 59.1 mm deep, equivalent to approximately 3.8 × 0.62 × 2.33 inches.
How much does the 2085-ECR weigh?
Rockwell Automation lists an approximate shipping weight of 50 g or 1.76 oz.
What is the difference between 2085-ECR and 2085-ECRK?
The 2085-ECRK is the conformal-coated variant. Rockwell Automation states that the published technical specifications of the coated and non-coated versions are the same.
Can the 2085-ECR be used with a Micro850 analog output module?
Yes. It terminates a compatible expansion I/O bus that may include modules such as the 2085-OF4, together with other supported Bulletin 2085 modules.
Is the 2085-ECR suitable for hazardous locations?
The manufacturer documents Class I, Division 2, Groups A, B, C and D suitability for appropriately marked products. Installation must comply with the relevant approval conditions and hazardous-location electrical safety requirements.
Is the Allen-Bradley 2085-ECR discontinued?
No. Rockwell Automation currently lists the 2085-ECR with an Active lifecycle designation.
What should be checked before ordering?
Confirm catalog number 2085-ECR, Micro850 or Micro870 controller compatibility, Bulletin 2085 expansion I/O system, right-end mounting position, 96.4 × 15.6 × 59.1 mm dimensions, suitable control enclosure and whether the standard 2085-ECR or conformal-coated 2085-ECRK version is required.
